1987 MITSUBISHI MONTERO air condition

AIR-CONDITIONING -Service Adjustment Procedures 24-41
COMPRESSOR NOISE NWLM
When investigating an air conditioning related noise, you must first know the conditions when the noise occurs.
These conditions are: weather, vehicle speed, in gear or neutral, engine temperature or any other special
conditions.
Noises that develop during air- conditioning operation can often be misleading. For example: what sounds like a
failed front bearing or connecting rod, may be caused by loose bolts, nuts, mounting brackets, or a loose clutch
assembly. Verify accessory drive belt tension (power
steering, alternator or air pump). Improper accessory drive belt
tension can cause a misleading noise when the compressor is engaged and little or no noise when the compressor
is disengaged.
Drive belts are speed sensitive. That is, at different engine speeds, and depending upon belt tension, belts can
develop unusual noises that are often mistaken for mechanical problems within the compressor.
Adjustment Procedures
(1) Select a quiet area for testing. Duplicate conditions as much as possible. Switch compressor on and off several
times to clearly identify compressor noise.
To duplicate high ambient conditions (high head pressure), restrict air-flow through
condenser. Install
manifold gauge set to make sure discharge pressure does not exceed 2,070 kPa (300 psi).
(2) Tighten all compressor mounting bolts, clutch mounting bolt, and compressor drive belt. Check to assure clutch
coil is tight (no rotation or wobble).
(3) Check refrigerant hoses for rubbing or interference that can cause unusual noises.
(4) Check refrigerant charge (See “Charging the System”).
(5) Recheck compressor noise as in Step 1.
(6) If noise still exists, loosen compressor mounting bolts and retorque. Repeat Step 1.
(7) If noise continues, replace compressor and repeat Step 1.
1 STB Revision

24-42 AIR-CONDITIONING - Air Conditioner Switch
AIR CONDITIONER SWITCH
REMOVAL AND INSTALLATION N24CLA-
2ow929
Removal steps
1. Lap heater duct (C)
2. Glove box stoppers
3. Knobs
4. Plugs
5. Center panel
6. Connection of center panel wiring har-
ness to front wiring harness connector
7. Air conditioner switch
NOTE
(1) Reverse the removal procedures to reinstall. (2) +e : Refer to “Service Points of Removal”
SERVICE POINTS OF REMOVAL
1. REMOVAL OF GLOVE BOX STOPPERS
(1) Open the glove box lid.
(2) Remove the glove box stopper.
(3) Pull the glove box outward.
1 STB Revision

24-44 AIR-CONDOTIONING-Evaporator
DISASSEMBLY AND REASSEMBLY
1

Disassembly steps
1. Air conditioner relay
2. Thermostat
3. Screw
4* 4. Clip
5. Evaporator case (upper)
6. Evaporator case (lower)
7. Evaporator assembly
+e l + 8. Expansion valve
NOTE
(1) Reverse the disassembly procedures to reassemble.
(2) +e : Refer to “Service Points of Disassembly”.
(3) l + : Refer to “Service Points of Reassembly”.
N24RE-- -6
2OW828
2OW718
2ow722
a 0-rina
Expansion
valve
O-rim
SERVICE POINTS OF DISASSEMBLY
4. REMOVAL OF CLIP
N24RFAB Remove the clips with a flat-blade screwdriver covered with a
shop towel to prevent damage to case surfaces.
8. REMOVAL OF EXPANSION VALVE Use two wrenches to loosen the flare nut on the pipe con-
nection (for both the inlet and outlet).
SERVICE POINTS OF REASSEMBLY N24RHAE
8. APPLICATION OF COMPRESSOR OIL TO EXPANSION
VALVE Apply specified compressor oil to the O-rings and install
the expansion valve to the evaporator assembly.
Specified oil : DENS0 oil 6
1 STB Revision

AIR-CONDITIONING - Receiver drier, Condenser, Compressor Clutch Assembly 24-45
RECEIVER DRIER, CONDESER, COMPRESSOR CLUTCH ASSEMBLY
REMOVAL AND INSTALLATION N24TA--
Pre-removal Operation l Discharge the Refrigerant. (Refer to
P.24-36)
l Remove the Radiator Grille. (Refer
to GROUP 23 BODY-Grille, Garnish,
Moulding)
l Disconnect the Liquid Pipes and
Hoses.
Post-installation Operation
l Install the Radiator Grille. (Refer to
GROUP 23 BODY-Grille, Garnish,
Moulding)
l Charge the Refrigerant. (Refer to
P.24.37)
l Adjustment of the Tension of the
Air Conditioner Drive Belt. (Refer to
P.24-40)
2OW832 Receiver drier removal steps
Compressor clutch assembly removal steps
1. Reveiver drier mounting bolt
8. Drive belt
2. Receiver drier
9. Compressor clutch assembly mounting
Condenser removal steps
3. Blower motor connector
4. Blower motor mounting bolt
5. Blower motor
6. Condenser mounting bolt
7. Condenser bolt
10. Compressor clutch assembly
NOTE
Reverse the removal procedures to reinstall.
SERVICE POINTS OF REMOVAL N24TBAB 1 STB Revision Caution
If the hoses or pipes are disconnected,cap the hoses or pipes
with a blank plug to prevent entry of dust, dirt, and water.

24-46
COMPRESSOR
AIR-CONDITIONING - Compressor
DISASSEMBLY AND REASSEMBLY N24TE-
15-h Nm
11-13 ftlbs 16
a 0
I
26-26 Nm
16-20 ftlbs. Magnetic clutch disassembly steps
1. Nut
~~ Adjustment of clutch clearance
2. Clutch hub
3. Shims
4.
Snap ring
4* 5. Rotor assembly
6.
Snap ring
7.
Ground terminal
l + 8. Clutch coil
l5Dl
2QY947 Compressor front housing and service valve disas-
sembly steps
9. Oil drain guide
10.
Woodruff key
Il. Through bolt
** Refilling of compressor oil
12. Front housing
o+
13. Shaft seal
04 14.
Shaft plate
15.
Gasket
16. O-ring
NOTE
(1) Reverse the disassembly procedures to reassemble.
(2) +e : Refer to “Service Points of Disassembly”.
(3) e+ : Refer to “Service Points of Reassembly”.
(4)
q : Non-reusable parts 1 STB Revision

AIR-CONDITIONING - Compressor 24-47
SERVICE POINTS OF DISASSEMBLY N24TFAE
5. REMOVAL OF ROTOR ASSEMBLY
It may be necessary to lightly tap the rotor with a plastic
hammer.
2OY713
Front housing
Shaft pl&e
2OY789
I MB990?83-01 2OY790
2OY788
INSPECTION N24TGAC
l
Check the surface of the clutch hub for scoring or bluing.
l Check the surface of the rotor for scoring or bluing.
l Check the sealing surfaces for cracks, scratches and deforma-
tion.
l Check the front housing for cracks or scoring on the sealing
surfaces.
l Check the compressor shaft for scoring.
SERVICE POINTS OF REASSEMBLY N24THAH
14. INSTALLATION OF SHAFT PLATE
(1) Lubricate the shaft plate and a new O-ring with
compressor oil. Push the shaft plate and O-ring into the
front housing.
(2) Install the seal plate into the front housing with a
special tool.
13. INSTALLATION OF SHAFT SEAL
Lubricate the shaft seal with compressor oil. Install the
shaft seal on the shaft.
NOTE
Rotate the shaft seal lightly by hand to check that it is
fitted into the notch on the compressor shaft. evision
r